Number of length-n binary words containing no antisquares except 01 and 10.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =12a(5) =20a(6) =30a(7) =46a(8) =72a(9) =112a(10) =164a(11) =248a(12) =364a(13) =542a(14) =796a(15) =1180a(16) =1732a(17) =2550a(18) =3744a(19) =5504a(20) =8076a(21) =11854a(22) =17386a(23) =25498a(24) =37382a(25) =54808a(26) =80342a(27) =117770a(28) =172618a(29) =253008